When I post a link to one of our Story Map Journals on Facebook I am getting a less than ideal preview. Here is an example:

The title and text are not very good for promotional purposes. The HTML snippet looks especially terrible. I am sure that Facebook used to allow the user to edit these before you posted, but that feature appears to have disappeared.
We would like to promote this via our organisation's Facebook page, but I am certain that the marketing folk will not get on board if it looks like this. Is there anything I can do with an Esri hosted Story Map to ensure that the title and text are more "share friendly"?